Module transcript

Transcript types.

All application data communicated over a TLS connection is referred to as a Transcript. A transcript is essentially just two vectors of bytes, each corresponding to a Direction.

TLS operates over a bidirectional byte stream, and thus there are no application layer semantics present in the transcript. For example, HTTPS is an application layer protocol that runs over TLS so there is no concept of “requests” or “responses” in the transcript itself. These semantics must be recovered by parsing the application data and relating it to the bytes in the transcript.

Commitments

During the attestation process a Prover can generate multiple commitments to various parts of the transcript. These commitments are inserted into the attestation body and can be used by the Verifier to verify transcript proofs later.

To configure the transcript commitments, use the TranscriptCommitConfigBuilder.

Selective Disclosure

Using a TranscriptProof a Prover can selectively disclose parts of a transcript to a Verifier in the form of a PartialTranscript. A Verifier always learns the length of the transcript, but sensitive data can be withheld.

To create a proof, use the TranscriptProofBuilder which is returned by Secrets::transcript_proof_builder.

Structs

• Idx
  Transcript index.
• IdxBuilder
  Builder for Idx.
• InvalidSubsequence
  Invalid subsequence error.
• PartialTranscript
  A partial transcript.
• Subsequence
  Transcript subsequence.
• Transcript
  A transcript contains all the data communicated over a TLS connection.
• TranscriptCommitConfig
  Configuration for transcript commitments.
• TranscriptCommitConfigBuilder
  A builder for TranscriptCommitConfig.
• TranscriptCommitConfigBuilderError
  Error for TranscriptCommitConfigBuilder.
• TranscriptProof
  Proof of the contents of a transcript.
• TranscriptProofBuilder
  Builder for TranscriptProof.
• TranscriptProofBuilderError
  Error for TranscriptProofBuilder.
• TranscriptProofError
  Error for TranscriptProof.

Enums

• Direction
  The direction of data communicated over a TLS connection.
• TranscriptCommitmentKind
  Kind of transcript commitment.

Statics

• RX_TRANSCRIPT_ID
  Received data transcript ID.
• TX_TRANSCRIPT_ID
  Sent data transcript ID.